The next step is to create a new layer for the stairs.
As with previous steps where new layers were added, the same process must be followed to create a layer for the Stairs.
First, open the Layers Panel.
Second, lock the Fireplace layer since no additional changes have to be made.
Third, press on the Layers Settings Menu and select the Add Layer option to create a new layer.
Fourth, as before, triple tap on the new layer (Layer 6) and rename it to Stairs.
Lastly, make certain the Stairs layer is selected, then dismiss the Layers Panel by tapping on the Hide Sidebar Button in the bottom lower left of the panel.
The Layers Panel will appear as shown below once the above steps have been completed.